const mongoose = require("mongoose")
const url = process.env.DB_BASE_URL
const dbName = process.env.DB_NAME
//mongoose.set('useFindAndModify', false)
mongoose.connect(`${url}/${dbName}`, {
  useNewUrlParser: true,
  useUnifiedTopology: true
})
const db = mongoose.connection

db.on('error', (err) => {
  console.log(err)
})

db.on('open', () => {
  console.log('数据库连接成功')
})
module.exports = mongoose